Dear GLOBEX® Customers,

In order to allow additional time for testing and customer certification, the release of implied butterfly spread functionality previously scheduled for Sunday, September 5, 2004, is now scheduled for Sunday, October 17, 2004 (trade date October 18). Firms and ISVs are strongly encouraged to complete testing and certification before the customer mock trading session scheduled for Saturday, September 25, 2004. This is particularly important in light of the fact that CME Eurodollars traded on GLOBEX have continued to set volume records.

If you have any questions, please contact your GLOBEX Account Manager at 312.634.8700 or email GLOBEX Account Management.

Thank you,

Chicago Mercantile Exchange